|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Craniata - Trimerellida - Trimerellidae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|G. A. Cooper 1956||Broadly oval shells suggesting Dinoholiis on the exterior but with moderately developed broad and low platform in the pedicle valve and scarcely any development of a platform in the brachial valve. In any case the platforms are low and consist of broad thickening only, without elevation and excavation.|